What is NFC you say? It’s a card that is intended to work without it having to touch the card reader. The problem is some people are getting charged twice even though they didn’t take the card out of their wallets or purse. It’s a good idea to get a RFID-shielding cover for your debit / credit cards and your passport. Or you can make a cover from aluminum foil, instructions here http://www.rpi-polymath.com/ducttape/RFIDWallet.php

Note: the cover might not keep the card or passport from being read entirely, but it will cut down on the distance that the contents can be read at.

I do not recommend trying to damage the RFID chip.

This story is a timely reminder to keep an eye on your financial transactions!